21141124452 has 144 divisors (see below), whose sum is σ = 67478890752. Its totient is φ = 5437808640.

The previous prime is 21141124423. The next prime is 21141124483. The reversal of 21141124452 is 25442114112.

21141124452 is a `hidden beast` number, since 2 + 1 + 1 + 411 + 244 + 5 + 2 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8749 + ... + 205812.

It is an arithmetic number, because the mean of its divisors is an integer number (468603408).

Almost surely, 2^21141124452 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21141124452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33739445376).

21141124452 is an abundant number, since it is smaller than the sum of its proper divisors (46337766300).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21141124452 is a wasteful number, since it uses less digits than its factorization.

21141124452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214618 (or 214613 counting only the distinct ones).

The product of its digits is 2560, while the sum is 27.

Adding to 21141124452 its reverse (25442114112), we get a palindrome (46583238564).

The spelling of 21141124452 in words is "twenty-one billion, one hundred forty-one million, one hundred twenty-four thousand, four hundred fifty-two".